Armstrong Drive Socket, Deep Length, Measurement System Metric, 1/2 in Drive, Square Drive, 12 Point Socket, 22 mm Socket, 3.205 in Overall Length, 1.173 in Drive End Width, 1.173 in Socket End Width, 0.772 in Bolt Clearance Depth, 1-1/2 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated